when did 9-11 occur

The September 11 attacks, also known as 9/11, occurred on September 11, 2001. On this day, four coordinated terrorist attacks were carried out by al-Qaeda, involving the hijacking of four commercial airliners. Two planes were crashed into the Twin Towers of the World Trade Center in New York City, one into the Pentagon near Washington, D.C., and the fourth plane crashed in a field in Pennsylvania after passengers intervened. These attacks resulted in the deaths of 2,977 people and had a profound impact on the United States and the world.